DVD Player Dead Now Repaired
I received this DVD player in my shop for repair, on the model label it was written SONY but when I opened it, I noticed it is not an original SONY DVD player as you can see by yourself.
With the top cover off I applied power and I noticed it is powering ON because I could see the pickup move a bit.
Looking at the display screen I noted it has no display (just blank), I asked the owner for a brief history of this DVD player and he told me that before the screen went blank it used to write “NO DISC”. With that I decided to check the state of the spindle motor which can cause such a symptom if faulty.
To check the spindle motor I used my favourite meter for this which is the analogue meter set to low ohm(X1).
If the spindle motor is good it should read low ohm and also rotate at high speed, this I did and the motor was found to be in good health. By the way you don’t have to remove the spindle motor to test with a meter, just solder out the red and black wire at the small PCB board where they are connected.
Next I wanted to know if the lens is okay, a simple test for lens is to take it(pickup) to the outer lane when the power is off (you can use gears) to do this. After that apply power and if the pickup moved smoothly to the centre and the lens start moving up and down with a deep red light flashing means the lens is probably okay as it is trying to focus.
In my case the Pickup moved smoothly to the centre as expected but no red light and therefore I suspected it to be faulty. I normally change the lens as my last resort and therefore I decided to continue troubleshooting the DVD player.
First I decided to see if the output from the power supply is good and stable, I always do this because if the power supply is not good, it can cause other circuit to behave funny and therefore it is always good practice to check if the supply is okay. I checked it with my digital meter and I got +5, +12,-12, with that I concluded the power supply was good. The owner who was with me all this time decided to call it a day and I was left alone in the shop.
Now that I was alone I decided to do some more troubleshooting, first I wanted to know why there is no display on the screen. So I opened the display circuit assembly module trying to investigate why there is no display. Upon getting this small board out, I started scanning the board looking for dry joints or loose connection; I noted the read wire to the power ON button was broken where it connects to the P.C.B
In electronics we start from known to unknown, so I decided to solder the wire back, afterward I decided to apply power to see the effect of that. To my surprise after applying power I noted the display was now back, just when I was about to celebrate this new development, I got yet another surprise to see the lens now full red searching for the disc to read.
I loaded music CD Disc and indeed the DVD player was now working.
Conclusion: most DVD player problems are mechanical and very inexpensive to repair and rarely require sophisticated test equipment, just observing using the best tools I have come to realize in my troubleshooting experience which are absolutely free “YOUR SET OF EYES”
Thank you guys
Stay safe
Humphrey Kimathi is from Kenya and the author of DVD Player repair guide,CRT Television repair course , CRT Television troubleshooting guide and Basic Electronics course.
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31 Comments
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Andre Gopee
March 6, 2015 at 10:22 pm
Excellent Job Mr. Humphrey. Keep up the good work.
Humphrey Kimathi
March 9, 2015 at 1:20 pm
Andre Gopee! Thank for those powerful words of encouragement.
Wishing you the best too.
Regards Humphrey
Merlin Marquardt
March 6, 2015 at 10:28 pm
Very good.
Humphrey Kimathi
March 9, 2015 at 1:24 pm
Thanks Merlin.
Regards Humphrey
Humberto
March 7, 2015 at 12:10 am
Hi Humphrey Kimathi, I confess I've been following your articles for a whilemin Mr. Jestine Yong's blog and can appreciate you are very professional. Congratulations and keep up.
Humphrey Kimathi
March 9, 2015 at 1:30 pm
HI Humberto, thanks for your feedback and glad to note you find my article useful..
Regards Humphrey
Anthony
March 7, 2015 at 1:59 am
Nice work !
Robert Calk
March 7, 2015 at 2:24 am
Good job Humphrey. Those were words of wisdom.
Robert Calk
March 7, 2015 at 9:53 pm
What kind of jerk would click dislike on a compliment like that? Why do you even come to this blog?
I will give Humphrey another compliment and say that I like his CRT e-book very much and am glad to have it in my collection of books!
Now, you can click dislike on this one also, jerk!
Humphrey Kimathi
March 9, 2015 at 1:15 pm
Hi Robert, worry not the likes have it. again thanks you for your continued confidence in my books. May God continue increasing your boundaries.
Regards Humphrey
mahmoud_tajpour
March 7, 2015 at 3:24 am
dear mr. Humphrey thanks a lot indeed your action is excellent I hope you are successfully more and more.
Humphrey Kimathi
March 9, 2015 at 1:33 pm
Hi Mahmoud, thank for wishing me well Mahmoud , i also wish you the best from the bottom of my heart. Be blessed till you vibrate..
Regards Humphrey
margarito sanchez
March 7, 2015 at 5:34 am
hello good note thanks
for sharing your experience
greetings .
Humphrey Kimathi
March 9, 2015 at 2:56 pm
Thank you Sanchez, watch this space for more articles.
Regards Humphrey
Mark
March 7, 2015 at 5:50 am
Hey Humphrey,
Thanks for your article. I have a few DVD players that I have spent some time diagnosing. You have given me some good techniques and ideas to try out next time.
Keep up the good work
Humphrey Kimathi
March 9, 2015 at 2:55 pm
Thank you Mark. all the best.
Regards Humphrey
Ehsan Murad
March 7, 2015 at 12:05 pm
Excellent article. very well explained and illustrated
Humphrey Kimathi
March 9, 2015 at 1:34 pm
I like what i hear from you Murad, THANK YOU.
regards Humphrey
Yogesh Panchal
March 7, 2015 at 1:22 pm
Sir,
Good explanation pleas keep sharing the article.
Humphrey Kimathi
March 9, 2015 at 1:36 pm
Thank you my friend Yogesh.
Regards Humphrey
Biruk aweke
March 7, 2015 at 2:28 pm
Nice job thanks.
Humphrey Kimathi
March 9, 2015 at 1:43 pm
Welcome Mr.Aweke
regards Humphrey
bernard
March 7, 2015 at 8:55 pm
hello all, correct me if I am wrong , but here in India, I'm seeing less and less of CD/DVD players and More or MP3/SD card players in the markets these days ... any of you see the same trend ?
regds bernard /~
Robert Calk
March 8, 2015 at 7:52 pm
Here in the USA many people are using the MP3, etc., but many people still use CD players also. I still have a CD player in my vehicle. Most, if not all, CD players now have a port to plug in a MP3 if you wish, so we can use either. I downloaded all of my CD's into my computer so I'll still have them when I lose the CD's.
Humphrey Kimathi
March 9, 2015 at 1:38 pm
Well put Robert
Regards Humphrey
Akinyosade Ebenezer
March 8, 2015 at 7:55 pm
Mr Humphrey,article is highly professional and well illustrated. This is the way article should be written for good understanding. So i say a big thank you.
Humphrey Kimathi
March 9, 2015 at 1:41 pm
Thank you Ebenezer, your feedback is very encouraging...
Regards Humphrey
Ernst
March 9, 2015 at 8:10 pm
Hi Humphrey,
Very nice job you did. I've learned something more
tesfaye kebede
March 11, 2015 at 11:21 am
hi j it is a nice work news letter,
Joshua Oloo
March 14, 2015 at 3:31 pm
Thanks Mr.Kimathi for such educative article.l always enjoy reading your articles and please keep it up sir.
Humphrey Kimathi
March 16, 2015 at 12:57 pm
Thanks for your feedback Mr.Oloo,
regards Humphrey